Radiator for transformer tanks



' R. V. BINGAY RADIATOR FOR TRANSFORMER TANKS Filed 001'.. l, 1920 ooooooooo ogooovooo oooqoooo Patented Apr. 7, 1925.

UNITED STATES PATENT'ol-rplcl-zf.

ROBERT V. BINGAY, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO PITTSBURGH TRANSFORMER GOMPANY, A CORPORATION 0E' PENNSYLVANIA.

RADIATOR FO'R TRANSFORMER TANKS.

Application led October 1, 1920.- Serial No. 414,146.

To all whom t may conce/m Be it known that I, ROBERT V. BINGAY, a citizen ot the United States, residing at ljittsburgh, in the county of Allegheny and State or Pennsylvania, have invented certain new and useful Improvements in Radiators for Transformer Tanks, of which the i'ollowing is a specification.

This invention relates to electrical apparatus cooled by a circulating fluid such as oil which in turn is cooled by the surrounding air. In such self-cooled apparatus, forinstance transformers, it is often necessary to provide special radiating means 'in addition to the tank surfaces to give a suflicient area of contact with the atmosphere. The chief object of this invention is to provide a simple, inexpensive radiator adapted to be carried on the side of the transformer tank and connected with the oil circulation so that the heated oil will pass through the radiator and be cooled thereby.

A. further object ofthe invention is to provic e a radiator which may be opened tor inspection and readily vcleaned throughout.

ln the accompanying drawings illustrating the invention- Figa 1 and 2 are elevational views of a radiator' embodying the invention, and

Fig. 3 is a horizontal sectional view on line 3 3 ot Fig. l.

Tn the specific embodiment of the invention illustrated in the drawings a transformer tank T carries the radiators R each of which is connected to the tank through the upper pipe 5 for the hot oil and the lower pipe 6 for the cooled oil. The lower pipe 6 is provided with a three-way valve 7 which may be turned to close pipe 6 or open connection between the radiator and the tank, or between the radiator and the discharge pipe 9 extending from the pipe 6. `By this means the radiator may be either connected or disconnected and when disconnected may be open through the lower outlet pipe 9 tor en'iptying.

The radiator R comprises upper and lower headers 10 and 1l and between these headers extend the radiating pipes 15 forming cooling conduits connected between the headers. In the operation or' the transformer the heated oil going out through pipe 5 into header 10 is distributed among the pipes 15 and flows downwardly through the header 7.1 to the pipe 6 to the bottom of the transformer tank T. f

The transformer cooling oil sometimesV deteriorates in practice and tends to become lviscous, so that the hot oil on being cooled in the pipes 15 deposits a heatinsulating lilm on the interior of the radiatingsuriiaces seriously interfering with the radiation ot' the heat and obstructing the flow so that a restricted. quantity of only partially cooled oil reaches the lower header- 11. turn causes a rise in the temperature of the transformer oil with consequent further deterioration and these conditions are accumulative causing dangerous overheating of the transformer. To prevent this objectionable deposit and stoppage of the flow the radia tors R are provided with removable covers Q0 for the upper headers 10 and similar bottom plates may be provided for the lower headers 11 instead of the closed bottoms 2l as shown. To provide for the removable cover 2() the top header 10 is flanged over at 23 and the cover 20 is fitted over this flange 23 with a gasket 24 in between. Clamps 25 are bolted to the edge of the cover 20 and extending under the flange 23 firmly press or pinch the flange and cover together when the clamping bolts are/tightened. These clamps 25 are easily released to permit removal of the cover by simply loosening the clamping bolts. With the valve 7 then turned to close pipe 6 and open connection between the header 11 and discharge 9 the radiator R will be emptied and its pipes will be accessible for inspection and cleaning. After this the cover 20 is replaced and valve 7 turned to reopen connection between the radiator and the lower part of the tank, the necessary oil being replaced in the main tank.

The radiator of this invention may be made of any suitable metal parts. It may for instance be made of steel throughout, the tubes 15 being simply ordinary pipes welded into the headers -10 and 11 at each end, and the whole being light and at the same time strong and durable. The easy accessibility of the cooling tubes for inspection and cleaning saves in cost of repair and replacement and keeps the transformer in operation by encouraging the operator to make frequent inspections. By adding shut off valves to the pipes 5 a transformer hav- This in jout emptying the tank T." This is particuf I V'shipped with the radiators` in place.

the same wouldA be true of the valve in theV upper pipe 5, so, that the radiators R Vmay be connected in place or di sconneetediWithT larly advantageous inf-ease it is, necessaryto remove the radiator from the tank for repair and Where the-.tank is too large to be In suchicaees: the radiator valves will loe closed and the; radiatore removed and then replaced Without. emptying or refilling the tanlrv which. are' troublesome operationsl and like-ly; to result in adding impurities and moiStlre; to tlieo il. While the invention has been shown in connection with a specific embfldment it. is not` confined thereto loutY thetank e to theupper header below the top thereof, the top oic said header being removable to permit; accessy to all of` saidpipes and nieane between the radiators and tank to allow 'draining of the Vradiator independently oft'l said' tank, said means beingj; also adapted to preventi draining of the tank on removal or"` the radiator.

ROBERT V. BINGAYL. Y 

